Underwater Explosion Test Cases

Abstract : Simulation of underwater explosions is an essential component of platform survivability and weapon lethality assessments. Success at this task requires predicting target loading, which primarily occurs as a consequence of the initial shock and subsequent bubble collapse. These damage mechanisms occur on time scales that differ widely, typically on the order of microseconds for the shock and milliseconds for collapse. Successful prediction of these events requires numerical techniques that can capture strong shocks and the interface between fluids with density ratios of 1000:1. This report describes a set of 19 test cases that exhibit such phenomena. These problems are divided into three groups: one-dimensional with fixed boundaries, two- and three-dimensional with fixed boundaries, and one-, two, and three-dimensional problems with moving boundaries. The specification of these problems includes grid size for a fixed Cartesian mesh.